Move frog/tests/{leg,leg_only,frog_native} to tests/compiler/.

frog/tests/leg_only/phi_gvn_test.dart

Index: frog/tests/leg_only/phi_gvn_test.dart
===================================================================
--- frog/tests/leg_only/phi_gvn_test.dart	(revision 8644)
+++ frog/tests/leg_only/phi_gvn_test.dart	(working copy)
@@ -1,12 +0,0 @@
-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-foo(x) { }
-
-main() {
-  for (var i = 0; i < 1; i++) {
-    foo(i + 1);
-    Expect.equals(0, i);
-  }
-}